The 89th Ohio Infantry Regiment, sometimes 89th Ohio Volunteer Infantry (or 89th OVI) was an infantry regiment in the Union Army during the American Civil War. Service The 89th Ohio Infantry was organized at Camp Dennison near Cincinnati, Ohio and mustered in August 26, 1862, for three years service under the command of Colonel John G. Marshall. The regiment was attached to Army of Kentucky, Department of the Ohio, September–October, 1862. 2nd Brigade, Kanawha Division, District of West Virginia, Department of the Ohio, to February 1863. Crook's Brigade, Baird's Division, Army of Kentucky, Department of the Cumberland, to June 1863. 3rd Brigade, 4th Division, XIV Corps, Army of the Cumberland, to September 1863. 1st Brigade, 1st Division, Reserve Corps, Army of the Cumberland, to October 1863. 1st Brigade, 3rd Division, XIV Corps, Army of the Cumberland, to June 1865 The 89th Ohio Infantry mustered out of service at Washington, D.C. on June 14, 1865. Detailed service Ordered to Covington, Ky., September 3, 1862, and duty there until October 5, during the threatened attack on Cincinnati, Ohio, by Edmund Kirby Smith. Ordered to Point Pleasant, Va., October 5. Advance to Falls of the Kanawha, Va., October 10 – November 3, 1862, then moved to Fayetteville Court House November 17, and duty there until January 6, 1863. Moved to Nashville, Tenn., January 25 – February 7. Relief of 83rd Illinois Infantry, at Dover, from attack by Forrest's Cavalry February 3. Expedition to Carthage, Tenn., February 22–25. Duty at Carthage until June 5. Ordered to Murfreesboro, Tenn., June 5. Tullahoma Campaign June 23 – July 7. Hoover's Gap June 24–26. Tullahoma June 29–30. Occupation of middle Tennessee until August 16. Chickamauga Campaign August 16 – September 22. Expedition to Tracy City and destruction of Salt Peter Works at Nickajack Cove August 20 – September 10. Reconnaissance from Rossville September 17. Near Ringgold, Ga., September 17. Battle of Chickamauga September 19–21 (most of the regiment captured). Siege of Chattanooga, Tenn., September 24 – November 22. Reopening Tennessee River October 26–29. Brown's Ferry October 27. Near Chattanooga November 6. Chattanooga-Ringgold Campaign November 23–27. Orchard Knob November 23–24. Missionary Ridge November 25. Pursuit to Graysville November 26–27. Duty at Chattanooga until February 22, 1864. Demonstration on Dalton, Ga., February 22–27. Tunnel Hill, Buzzard's Roost Gap, and Rocky Faced Ridge February 23–25. Atlanta Campaign May 1 – September 8. Demonstrations on Rocky Faced Ridge May 8–11. Battle